Electric knife sharpener



FIG. 1 is a front elevational view of an electric knife sharpener showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right end elevational view thereof with the left end elevational view being identical; and,

FIG. 5 is a plan view thereof. 

The ornamental design for an electric knife sharpener, as shown and described. 